Synthes 207.646 4.0mm Cannulated Screw Short Thread/46mm

Synthes 4.0mm Cannulated Screw | Short Thread | 46mm | 207.646

The Synthes 207.646 is a high-precision internal fixation implant engineered for stable anchorage and active interfragmentary compression. As a 4.0mm diameter screw with a 46mm overall length and a short-thread profile, it is a foundational component of the Synthes 4.0mm/4.5mm Cannulated Screw System.

The short-thread design is specifically engineered to function as a lag screw. By ensuring the threads only engage the "far" bone fragment while the smooth 2.6mm shaft glides through the "near" fragment, the screw head draws the two pieces together, creating high-tension compression across the fracture line.

Key Specifications

• Manufacturer: Synthes (DePuy Synthes)

• Model / REF: 207.646

• Material: 316L Surgical Stainless Steel

• Diameter: 4.0 mm

• Overall Length: 46 mm

• Thread Type: Short Threaded (Lag Design)

• Thread Pitch: 1.75 mm

• Core Diameter: 2.25 mm

• Shaft Diameter: 2.6 mm

• Cannulation: 1.35 mm (Compatible with 1.25mm Guide Wires)

• Head Diameter: 5.0 mm

• Features: Self-Drilling, Self-Tapping, 2mm Depth Increments

• Quantity: 1 Each

Technical & Clinical Advantages

• Guided Accuracy: The 1.35mm internal bore allows the screw to be delivered over a pre-placed 1.25mm guide wire. This allows the surgeon to confirm the trajectory via fluoroscopy before the screw is seated, which is critical for percutaneous applications and avoiding articular surface penetration.

• Self-Drilling & Self-Tapping Tip: The distal tip features precision-machined cutting flutes that eliminate the need for separate drilling and tapping steps in most cancellous bone applications. This reduces operative time and minimizes instrumentation requirements.

• Integrated Depth Control: The screw shaft includes visual markings in 2mm increments. This provides the surgeon with real-time feedback regarding the screw’s advancement, ensuring the tip achieves bicortical purchase without over-penetrating soft tissues.

• High Strength-to-Weight Ratio: With a 2.25mm core diameter, the 207.646 provides significant torsional and shear strength, resisting the mechanical loads encountered during early functional mobilization.

• 316L Stainless Steel Biocompatibility: Forged from vacuum-melted surgical steel, the implant is highly corrosion-resistant and biologically inert, ensuring long-term durability within the physiological environment.

Applications

• Foot & Ankle Surgery: Fixation of medial malleolar fractures, calcaneal osteotomies, and midfoot fusions.

• Hand & Wrist: Stabilization of carpal fractures or distal radius fragments where guided compression is required.

• Pediatric Orthopedics: Precise fixation of epiphyseal fractures (Salter-Harris) where the guide wire protects the growth plate during trajectory planning.

• Metaphyseal Trauma: Stabilization of avulsion fractures or small fragments in the proximal or distal ends of long bones.

Condition & Quality Assurance

• Status: NEW — Unused.

• Integrity: The implant maintains its factory-specified structural and material integrity. All threads, the 1.35mm cannulation, and the drive recess are pristine.

• Sterilization Note: This device is provided as a NON-STERILE implant. It MUST be properly cleaned and sterilized (standard steam autoclave) in accordance with validated hospital protocols and Synthes’ Instructions for Use (IFU) prior to clinical implantation in 2026.

• Professional Standards: With over 25 years of experience in surgical logistics, Primis Medical ensures all Synthes implants are handled and stored to maintain their mechanical and chemical precision.

Shipping & Handling

• Secure Logistics: Shipped in protective packaging to ensure the precision-machined 46mm shaft remains perfectly straight and the internal cannulation remains unobstructed.

• Fast Dispatch: Ships within 1 business day.